Mykhailo

Chernobai Mykhailo
JAVA DEVELOPER
Poland, Warsaw (Remote) | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | Telegram | LinkedIn | GitHub

SKILLS

Java, Spring(Boot, Cloud, Security, MVC, AI), SQL, JavaScript, Hibernate, Redis, PostgreSQL, MongoDB,
REST, OOP, SOLID, Design Patterns, Docker, Kafka, Maven, Git, JUnit, Mockito, TDD, Grafana, Prometheus,
Micrometer, Zipkin, Loki, IntelliJ IDEA, Postman, cURL, Linux, Bash, Neovim, HTML, CSS, Swagger, JWT,
OAUTH2, JSON, Gradle, Agile, Scrum.

EXPERIENCE

UkrSoftLab​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Junior Java Developer​ ​ ​ ​ ​ ​ ​ ​ 2024 July- 2025 March

Worked as part of a distributed backend team on a delivery management platform for a logistics client in the EU
market. Initially joined as a trainee and transitioned into a junior role after a ~2-month onboarding period under
mentor supervision.

●​ Took part in developing backend modules for order tracking, validation logic, and SLA-related features.
●​ Contributed to the implementation of business rules for order lifecycle management, including status
transitions and event-driven updates.
●​ Collaborated on integration with external systems (e.g., geolocation and delivery APIs), assisting in
resolving data consistency issues and validation errors.
●​ Participated in efforts to optimize SQL queries in the tracking module, improving response time for
high-load endpoints by ~30% (measured using internal metrics).
●​ Wrote unit and integration tests (JUnit, Mockito) for newly developed features and regression coverage.
●​ Regularly involved in code reviews, refactoring discussions, and sprint grooming sessions using Jira and
Confluence.

Trainee Java Developer​ ​ ​ ​ ​ ​ ​ ​ 2024 May - 2024 July

●​ Studied and mapped the core system flows, including routing logic, validation steps, and scheduled
background jobs.
●​ Shadowed senior developers during architecture meetings and contributed documentation to internal
Confluence pages.
●​ Delivered small features and fixes through supervised pull requests, gradually gaining ownership of
limited-scope components.

HOBBIES AND INTERESTS

Linux System Exploration | Information Security | Artificial intelligence | Movie Watching

LANGUAGES

English - B2 | Polish - A1 | Russian - Native | Ukrainian - Native